import gst
import tempfile

GST_PIPE = ['v4l2src', 'num-buffers=1', 'deinterlace', 'jpegenc']

class Camera(object):

  def __init__(self):
    snap_file, self.snap_path = tempfile.mkstemp()
#    pipe = GST_PIPE + ['filesink location=%s' % self.snap_path]
    pipe = ['v4l2src', 'jpegenc', 'filesink location=%s' % self.snap_path]	 
    self.pipe = gst.parse_launch('!'.join(pipe))
    self.bus = self.pipe.get_bus()

  def Snap(self):
    """Take a snapshot."""
    self.pipe.set_state(gst.STATE_PLAYING)
    self.bus.poll(gst.MESSAGE_EOS, -1)

if __name__ == '__main__':
  c = Camera()
  c.Snap()
  print c.snap_path